The 227HS comes equipped with an exchangeable, robust 4mm round-tip and is available in 50 colours! There are three exchange tips available; the 4mm round-tip, the 2-5mm calligraphy tip and the 4mm high-flow tip. 227 markers feature Molotow’s patented capillary system which guarantees an even and controlled dye distribution. Together with the Flowmaster pump-valve, this means that you get a controlled paint-flow and great writing performance on nearly every surface. The mixing balls inside the markers make sure that the highly concentrated pigments are evenly distributed within the paint for optimal writing results. All markers are refillable – One 4 All refills are available in all 50 colours! The highly pigmented, acrylic-based hybrid-paint is easily mixable with other One 4 All colours (for individual shading), it can be diluted with water (for translucent effects) or with acetone (for permanency on fatty surfaces). It works on nearly every surface (check surface first), is semi-gloss, quick-drying and has an incredible opacity.